MDS PREP
The sterilising units should be monitored at which of the following intervals
1. Daily
2. Weekly
3. Biweekly
4. Monthly
Oral Surgery
Answer: 2
Sterilizing units should be monitored weekly to ensure proper function and
efficacy in killing bacteria and other microbes. This is done through
biological, chemical, and physical indicators.
A patient is allergic to PABA. Most probably he will also be allergic to
1) Lignocaine
2) Carbocaine
3) Prilocaine
4) Tetracaine
Oral Surgery
Answer: 4
Patients who are allergic to PABA (para-aminobenzoic acid) are likely to be allergic to tetracaine. This is because PABA is a common metabolite of amide-type local anesthetics, and tetracaine is also an amide anesthetic. Lignocaine and prilocaine are both ester-type anesthetics, which have different chemical structures and metabolic pathways, making an allergic reaction less likely in a patient with a PABA allergy. Carbocaine is a derivative of mepivacaine, which is also an amide, but the specificity of the allergy may not necessarily cross-react with all amide anesthetics.
A contraindication to local infiltration technique
1. Hypertension
2. Diabetic patient in whom urine sugar present
3. Infection in the arch
4. Kidney problems
Oral Surgery
Answer: 3
Local infiltration is a safe and effective technique for achieving anesthesia in
most situations. However, it is contraindicated in the presence of infection in
the arch because it can spread the infection further or lead to complications
like an abscess. Hypertension and kidney problems are not direct
contraindications to local anesthesia, but they may require careful monitoring
of the patient's condition. Diabetes with urine sugar present does not directly
contraindicate the use of local anesthetics unless there are severe
complications or neuropathy involved.
The longest acting, most potent and most toxic LA is
1) Lidocaine
2) Dibucaine
3) Bupivacaine
4) Tetracaine
Oral Surgery
Answer: 2
Dibucaine (cinchocaine) is a highly potent and long-acting local anesthetic with high toxicity. It is often used in topical applications but is avoided for systemic use due to its high risk of adverse effects compared to alternatives like bupivacaine.
Of the following in which condition local anaesthesia is ineffective?
1. Oedema
2. Localised infection
3. Haematoma
4. Anaemia
Oral Surgery
Answer: 2
Local anaesthesia is ineffective in localized infection.
Local anaesthetic cartridges contain small bubbles. These bubbles contain
1. Oxygen gas
2. Carbon dioxide gas
3. Nitrogen gas
4. Carbon monoxide gas
Oral Surgery
Answer: 3
Local anaesthetic cartridges contain small bubbles of nitrogen gas.
One decided to use forceps for removal of a tooth. The first direction for the force to be applied is
1. Buccally
2. Lingually or palatally
3. Apically
4. Occlusally
Oral Surgery
Answer: 3
When using forceps for removal of a tooth, the first direction for the force to be applied is apically.
Under general anaesthesia patient needs oropharyngeal
1. Lap pad
2. 4 * 4 gauge
3. Ferguson mouth gag
4. Pick up forceps
Oral Surgery
Answer: 2
Under general anaesthesia, a patient needs a 4 * 4 gauge.